Well, the bowsprit in not included on the J measure. It says 16.5, but with the bowsprit, the total distance is around 22'..
He also have the spinnKer pole around the same length. As said before, Lots of people will use this sail once and that's it, but this guy has one and likes to use it quite often. The problem is that the one he has is for a 32' sailboat, so, it looks ridiculous on the krogen.
He has been spending lot of money
on his boat lately, so he qanat a used spinnaker, so, symmetrical or asy, I convinced him to get the first sail that matches the measures no matter what shape, get rid of the pole, and get a snuffer and a tacker. The symmetrical can be used with attacker and works great, just like my avatar pic.
I will ask a sailmaker
, but there are none here in Costa Rica